公开(公告)号：US08843094B2

公开(公告)日：2014-09-23

申请号：US12853131

申请日：2010-08-09

申请人： Walid Ahmed ,  John Leung ,  Theodoros Georgantas ,  Morten Damgaard ,  Nelson Sollenberger

发明人： Walid Ahmed ,  John Leung ,  Theodoros Georgantas ,  Morten Damgaard ,  Nelson Sollenberger

IPC分类号： H04B1/06 ,  H04B7/00 ,  H04W52/24 ,  H04W52/52 ,  H04B17/00

CPC分类号： H04W52/52 ,  H04B17/318 ,  H04W52/245 ,  H04W52/246

摘要： Aspects of a method and system for integrated blocker detection and automatic gain control are provided. In this regard, a communication device may generate one or more first signal strength indications based on a strength of a received signal at a first point in the analog front-end of the communication device. The communication device may generate one or more second signal strength indications based on a strength of the received signal at a second point in a digital processing module of the communication device. The first point in the analog front-end may be an input or an output of a down-conversion mixer. The second point in the digital processing module may be an output of an analog-to-digital converter or an output of a channel selection filter. The communication device may control, utilizing the first signal strength indication(s) and the second signal strength indication(s), a gain of one or more components of the communication device.

摘要翻译： 提供了一种用于集成阻断检测和自动增益控制的方法和系统的方面。 在这方面，通信设备可以基于在通信设备的模拟前端的第一点处的接收信号的强度来产生一个或多个第一信号强度指示。 通信设备可以基于通信设备的数字处理模块中的第二点处的接收信号的强度来生成一个或多个第二信号强度指示。 模拟前端的第一点可以是下变频混频器的输入或输出。 数字处理模块中的第二点可以是模数转换器的输出或通道选择滤波器的输出。 通信设备可以利用第一信号强度指示和第二信号强度指示来控制通信设备的一个或多个组件的增益。

公开(公告)号：US08285239B2

公开(公告)日：2012-10-09

申请号：US13253030

申请日：2011-10-04

申请人： Alyosha Molnar ,  Morten Damgaard ,  Geoff Hatcher ,  Kenneth Chai-en Wu

发明人： Alyosha Molnar ,  Morten Damgaard ,  Geoff Hatcher ,  Kenneth Chai-en Wu

IPC分类号： H04B1/10 ,  H04L25/08

CPC分类号： H04B1/30 ,  H04B1/109

摘要： A system for correcting a second order intermodulation product in a direct conversion receiver is provided. The system includes a cross-covariance system receiving a data signal and a second order intermodulation estimate signal and generating a cross-covariance value. An auto-covariance system receives the second order intermodulation estimate signal and generates an auto covariance value. A buffer system stores a second order intermodulation product correction factor. A divider receives the cross-covariance value, the auto-covariance value and the second order intermodulation product correction factor and generates a running average second order intermodulation product correction factor.

摘要翻译： 提供一种用于在直接转换接收机中校正二阶互调产物的系统。 该系统包括接收数据信号和二阶互调估计信号并产生交叉协方差值的互协方差系统。 自动协方差系统接收二阶互调估计信号并产生自协方差值。 缓冲系统存储二阶互调产物校正因子。 分频器接收交叉协方差值，自协方差值和二阶互调乘积校正因子，并生成运行平均二阶互调乘积校正因子。

公开(公告)号：US07764055B2

公开(公告)日：2010-07-27

申请号：US11483687

申请日：2006-07-10

申请人： Dmitriy Rozenblit ,  Tirdad Sowlati ,  Morten Damgaard ,  Darioush Agahi

发明人： Dmitriy Rozenblit ,  Tirdad Sowlati ,  Morten Damgaard ,  Darioush Agahi

IPC分类号： G05F1/00

CPC分类号： H04B1/04 ,  H03F1/0227 ,  H03G3/3047 ,  H04B2001/0416 ,  H04W52/367 ,  H04W52/52

摘要： A supply voltage controlled power amplifier includes a power amplifier, a closed power control loop configured to generate a power control signal, and a voltage regulator coupled to the power control loop, the voltage regulator including a first regulator stage, a second regulator stage, and a peak detector, wherein an output of the second regulator stage is applied as a feedback signal to the first regulator stage and wherein an output of the first regulator stage is decreased to a level consistent with an output of the power amplifier and an additional operating buffer amount.

摘要翻译： 电源电压控制功率放大器包括功率放大器，被配置为产生功率控制信号的闭合功率控制回路和耦合到功率控制回路的电压调节器，所述电压调节器包括第一调节器级，第二调节器级和 峰值检测器，其中将第二调节器级的输出作为反馈信号施加到第一调节器级，并且其中第一调节器级的输出减小到与功率放大器的输出和附加操作缓冲器一致的电平 量。

公开(公告)号：US20090219100A1

公开(公告)日：2009-09-03

申请号：US12040875

申请日：2008-03-01

申请人： Rajasekhar Pullela ,  Morten Damgaard ,  Shahrzad Tadjpour ,  John E. Vasa ,  Hoon Lee

发明人： Rajasekhar Pullela ,  Morten Damgaard ,  Shahrzad Tadjpour ,  John E. Vasa ,  Hoon Lee

IPC分类号： G01R23/00

CPC分类号： H03C3/0925 ,  H03C3/0933 ,  H03C3/0941 ,  H03C3/095 ,  H03C3/0991

摘要： A phase-locked loop (PLL) is arranged to receive high-pass data at a first input and low-pass data at a second input. A first digital input is coupled to a primary path through a digital-to-analog converter (DAC) and a second digital input is coupled to a feedback path of the PLL. The controller provides the first input and the second input during a calibration procedure. The controller adjusts first and second control inputs in an attempt to keep the input voltage to a voltage-controlled oscillator (VCO) in the PLL constant while determining the gain of the VCO in Hz/LSB.

摘要翻译： 锁相环（PLL）被布置成在第一输入处接收高通数据并在第二输入端接收低通数据。 第一数字输入通过数模转换器（DAC）耦合到主路径，并且第二数字输入耦合到PLL的反馈路径。 控制器在校准过程中提供第一个输入和第二个输入。 控制器调整第一和第二控制输入，试图将输入电压保持为PLL中的压控振荡器（VCO），同时以Hz / LSB确定VCO的增益。

公开(公告)号：US20080051042A1

公开(公告)日：2008-02-28

申请号：US11510465

申请日：2006-08-25

申请人： Jaleh Komaili ,  John E. Vasa ,  Morten Damgaard ,  David S. Ripley

发明人： Jaleh Komaili ,  John E. Vasa ,  Morten Damgaard ,  David S. Ripley

IPC分类号： H04B1/04

CPC分类号： H04B1/0475 ,  H03F1/3241 ,  H03F1/3288 ,  H03F3/195 ,  H03F3/24 ,  H03F2201/3233 ,  H04B2001/0425

摘要： An adaptive predistortion system for controlling an open loop power amplifier includes a transmitter, a receiver, a phase and amplitude determination element configured to determine amplitude and phase characteristics of an output signal generated in the transmitter, the signal representing transmitter characteristics, an amplitude resampling element configured to generate an updated AM-AM predistortion signal based on the output signal generated in the transmitter, and an amplitude predistortion element configured to compare the updated AM-AM predistortion signal with a factory-calibrated AM-AM predistortion signal and generate an amplitude compensation signal. The adaptive predistortion system also includes a phase comparison element configured to compare the signal representing transmitter characteristics with a desired phase signal, a phase resampling element configured to generate an updated AM-PM predistortion signal based on the output signal generated in the transmitter, and a phase predistortion element configured to compare the updated AM-PM predistortion signal with a factory-calibrated AM-PM predistortion signal and generate a phase compensation signal.

摘要翻译： 用于控制开环功率放大器的自适应预失真系统包括发射机，接收机，相位和幅度确定元件，其被配置为确定在发射机中产生的输出信号的幅度和相位特性，表示发射机特性的信号，幅度重采样元件 被配置为基于在所述发射机中产生的输出信号产生更新的AM-AM预失真信号，以及幅度预失真元件，其被配置为将所述更新的AM-AM预失真信号与出厂校准的AM-AM预失真信号进行比较，并产生振幅补偿 信号。 自适应预失真系统还包括相位比较元件，其被配置为将表示发射机特性的信号与期望的相位信号进行比较;相位重采样元件，被配置为基于在发射机中产生的输出信号生成更新的AM-PM预失真信号，以及 相位预失真元件，被配置为将更新的AM-PM预失真信号与出厂校准的AM-PM预失真信号进行比较，并产生相位补偿信号。

公开(公告)号：US20070264947A1

公开(公告)日：2007-11-15

申请号：US11431759

申请日：2006-05-10

申请人： Dmitriy Rozenblit ,  Tirdad Sowlati ,  Darioush Agahi ,  Morten Damgaard

发明人： Dmitriy Rozenblit ,  Tirdad Sowlati ,  Darioush Agahi ,  Morten Damgaard

IPC分类号： H01Q11/12

CPC分类号： H03G3/3047

摘要： A system for saturation detection and compensation in a power amplifier includes a power amplifier, a closed power control loop configured to develop a power control signal (VPC), a comparator configured to receive the power control signal and a reference signal, the comparator also configured to determine whether the power amplifier is operating in a saturation mode, and power control circuitry configured to reduce the power control signal if the power amplifier is operating in a saturation mode.

摘要翻译： 功率放大器中的饱和检测和补偿系统包括：功率放大器，被配置为开发功率控制信号的闭合功率控制回路;配置成接收功率控制信号的比较器;以及 参考信号，所述比较器还被配置为确定所述功率放大器是否工作在饱和模式;以及功率控制电路，其被配置为如果所述功率放大器在饱和模式下工作，则降低所述功率控制信号。

公开(公告)号：US07218951B2

公开(公告)日：2007-05-15

申请号：US10885162

申请日：2004-07-06

申请人： Dmitriy Rozenblit ,  Morten Damgaard ,  Russell J. Fagg ,  William J. Domino

发明人： Dmitriy Rozenblit ,  Morten Damgaard ,  Russell J. Fagg ,  William J. Domino

IPC分类号： H04B7/00 ,  H04B1/04

CPC分类号： H04W52/52 ,  H03F1/0272 ,  H03F2200/294 ,  H03F2200/372 ,  H04B2001/0416

摘要： A single continuous closed-loop power control feedback system provides seamless power control for a power amplifier and also enables an AM signal to be injected into the power amplifier through the power amplifiers' control port. The AM signal is developed by an I/Q modulator and supplied to a comparator located in the power control loop. By using leakage from the power amplifier as feedback to a phase locked loop during initial power amplifier power ramp-up, the single continuous closed-loop power control system provides continuous feedback to the phase locked loop during the entire power amplification ramp-up period and eliminates the need for multiple feedback loops.

摘要翻译： 单个连续闭环功率控制反馈系统为功率放大器提供无缝功率控制，并且还可以通过功率放大器的控制端口将AM信号注入功率放大器。 AM信号由I / Q调制器开发，并提供给位于功率控制回路中的比较器。 在初始功率放大器功率提升期间，通过使用来自功率放大器的泄漏作为对锁相环的反馈，单个连续闭环功率控制系统在整个功率放大加速周期期间向锁相环提供连续反馈，并且 消除了对多个反馈环路的需要。

公开(公告)号：US06720839B1

公开(公告)日：2004-04-13

申请号：US09515633

申请日：2000-02-29

申请人： Valentina Della Torre ,  Frederic M. Stubbe ,  Morten Damgaard ,  Ricke W. Clark

发明人： Valentina Della Torre ,  Frederic M. Stubbe ,  Morten Damgaard ,  Ricke W. Clark

IPC分类号： H03C100

CPC分类号： H03D3/009

摘要： A system of and method for reducing or eliminating any unwanted sideband component in a signal derived from the output of a quadrature modulator. An unwanted sideband detector detects the unwanted sideband in the output of the quadrature modulator, and responsive thereto, a correction circuit corrects a baseband signal prior to inputting it to the quadrature modulator. In one embodiment, the unwanted sideband detector is an envelope detector.

摘要翻译： 用于减少或消除从正交调制器的输出得到的信号中的任何不需要的边带分量的系统和方法。 不需要的边带检测器检测正交调制器的输出中的不需要的边带，并且响应于此，校正电路在将基带信号输入到正交调制器之前校正基带信号。 在一个实施例中，不需要的边带检测器是包络检测器。

公开(公告)号：US06697613B1

公开(公告)日：2004-02-24

申请号：US09634081

申请日：2000-08-08

申请人： William J. Domino ,  Morten Damgaard ,  Darioush Agahi-Kesheh ,  Arvind Arora

发明人： William J. Domino ,  Morten Damgaard ,  Darioush Agahi-Kesheh ,  Arvind Arora

IPC分类号： H04B110

CPC分类号： H04B1/1036

摘要： A system for reducing internal interference in a radio-frequency (RF) receiver includes providing a plurality of time slots within a frame where the receiver is configured to receive external RF signals during a receive time slot within the frame. Data is collected during a receive time slot of a frame, and a receive data value is calculated corresponding to the collected data. A predetermined portion of the data collected is inspected, and a bias data value is calculated. The bias value is attributable to interference signals caused by the internal interference. The bias data value is added to an accumulator, and over time, a running average of the bias data values is determined. A portion of the running average is subtracted from the sample stream of data to provide output data corresponding to the external RF signals absent the internal interference.

摘要翻译： 用于减少射频（RF）接收机内部干扰的系统包括在帧内提供多个时隙，其中接收机被配置为在帧内的接收时隙期间接收外部RF信号。 在帧的接收时隙期间收集数据，并且对应于所收集的数据计算接收数据值。 检查收集的数据的预定部分，并计算偏差数据值。 偏置值归因于由内部干扰引起的干扰信号。 偏置数据值被添加到累加器，并且随着时间的推移，确定偏置数据值的运行平均值。 从采样数据流中减去运行平均值的一部分，以提供对应于不存在内部干扰的外部RF信号的输出数据。

公开(公告)号：US06360087B1

公开(公告)日：2002-03-19

申请号：US09260919

申请日：1999-03-02

申请人： Dmitriy Rozenblit ,  William J. Domino ,  Morten Damgaard ,  Mark Oskowsky

发明人： Dmitriy Rozenblit ,  William J. Domino ,  Morten Damgaard ,  Mark Oskowsky

IPC分类号： H04B106

CPC分类号： H04B1/406 ,  H03D3/006 ,  H03D7/1408 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0047 ,  H03D2200/009 ,  H04B1/30

摘要： A direct conversion receiver system is provided in which a first input signal at a first frequency is applied to a first input port of a multiplier, a second input signal at a second frequency equal to about {fraction (1/n)} times the first frequency, wherein n is an integer, is applied to a second input port of the multiplier. A first filter coupled to the first input port is configured to substantially filter out any leakage at the second frequency which may be present. A second filter coupled to the second input port is configured to substantially filter out any leakage at the first frequency which may be present. The multiplier is configured to produce a signal at an output port thereof which is derived from the product of the first and second signals. In one embodiment, the output is representative of the product of the filtered first signal and a multiplication factor which switches at n times the second frequency. The output of the multiplier is coupled to a third filter. The output signal has a baseband component and another component. The third filter is configured to substantially filter out the other component and substantially maintain the baseband component in the output signal. In one implementation example, the multiplier is a mixer initializing half-frequency injection, such that the LO frequency is about ½ the RF frequency.

摘要翻译： 提供一种直接转换接收机系统，其中以第一频率的第一输入信号被施加到乘法器的第一输入端口，第二频率的第二输入信号等于第一频率的大约{分数（1 / n）}倍） 频率，其中n是整数，被施加到乘法器的第二输入端口。 耦合到第一输入端口的第一滤波器被配置为基本上滤除可能存在的第二频率处的任何泄漏。 耦合到第二输入端口的第二滤波器被配置为基本上滤除可能存在的第一频率处的任何泄漏。 乘法器被配置为在其输出端口处产生从第一和第二信号的乘积导出的信号。 在一个实施例中，输出代表滤波后的第一信号和在第二频率n倍切换的乘法因子的乘积。 乘法器的输出耦合到第三个滤波器。 输出信号具有基带分量和另一分量。 第三滤波器被配置为基本上滤除另一分量并且基本上保持输出信号中的基带分量。 在一个实施例中，乘法器是混频器初始化半频率注入，使得LO频率约为RF频率的1/2。